本研究意旨探討應用於旋轉電機上之非隔離式高降壓比轉換器，針對應用需求設計並分析具高降壓比及體積小之直流-直流轉換器架構。為提升系統穩定性與完整性，研究探討該轉換器於不同輸出功率條件下電路動作原理，並同時建構完整的交流擾動小訊號等效模型，此模型提供挑選適用補償器種類及回授控制重要設計資訊，其控制方法為負載電壓回授控制，該轉換器具備迴路相位裕度76.8˚與交越頻率23.3 kHz，確保系統具備良好暫態響應與穩態誤差控制能力。為驗證所提出電源轉換架構之效能與可行性，本研究建立一套硬體電路及實驗測試，系統規格經使用條件評估為輸入額定電壓300 V並具備±5%之容錯範圍，輸出電壓及最大功率目標為24 V及96 W。實驗結果顯示，系統於不同輸入電壓和輸出功率條件下皆可穩定輸出目標電壓，且具有良好輸出電壓調節能力及低輸出電壓漣波率，其中最高轉換效率可達81.6%，顯示本文所設計高降壓比轉換器於目標應用情境中具備實用性與高效能，適合整合於需高降壓比及體積小之相關電源轉換系統中。

The purpose of this study is to investigate non-isolated high output ratio converters for rotary motor applications and to design and analyze DC-DC converter architectures with high output ratios and small sizes for application requirements. In order to improve the stability and integrity of the system, we investigate the circuit operation principle of the converter under different output power conditions and construct a complete AC small-disturbance-small-signal equivalent model, which provides important design information for the selection of the compensator and the feedback control, and the control method is the load-voltage feedback control, which is equipped with a loop phase margin of 76.8˚ and an overrun frequency of 23.3 kHz to ensure that the system has a good The control method is a load voltage feedback control with a phase margin of 76.8˚ and a crossover frequency of 23.3 kHz to ensure a good transient response and stable error control. In order to verify the performance and feasibility of the proposed power conversion architecture, a set of hardware circuits and experimental tests were conducted. The system specifications were evaluated under the conditions of use as input rated voltage of 300 V with ±5% error tolerance, and the output voltage and maximum power targets were 24 V and 96 W. The system is designed to provide the maximum power and output voltage of 24 V and 96 W. The system is designed to provide the maximum power and input voltage of 300 V with ±5% error tolerance. The experimental results show that the system can stably output the target voltage under different input voltage and output power conditions with good output voltage regulation and low output voltage ripple rate, and the maximum conversion efficiency can reach 81.6%, which demonstrates that the high dropout voltage converter designed in this paper has practicality and high performance in the target application, and it is suitable to be integrated into the related power conversion system that requires high dropout voltage ratio and small size. The design is suitable for integration into relevant power conversion systems that require high step-down and small size.

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